Simulation resultsare then compared to experimental data, first in nominal operating conditions. Both the polarization curve and local current density measurements are used to assess the goodness of fit. Then, the sensitivity of the model to changes of the inlet gases’ relative humidity and air stoichiometry is investigated. It will be focussed on the redistribution of local current production in response to the modification of operating conditions. Finally, simulation results in several parts of the fuel cell are shown and interpreted in detail.